think of the thrust line of the propeller
and for the smart guy that mentioned right foot for take off.. that's some
thrust but also P-factor

without counter rotating propellers,
consider downward arc of prop has more thrust, left engine, downward prop is
next to fuselage, right engine it is on the right side of that engine and
farther from fuselage, if the left (critical) engine fails then all that
thrust is way out on the right side moment arm causing yaw, and if real
slow, roll factors to deal with.

counter rotating propeller means the right engine the propeller rotates
counter clockwise, moving that thrust line closer to the fuselage, (now same
on both sides) and reduces the yaw action in the event of either engine
failing.. thus negating the "critical engine" factor.

You need to pick up and read a good multi engine training manual.. something
by Kershner

BT

"Dico" wrote in message
oups.com...
Hello,

We're looking into a twin and the Twin Comanche is on our list. I know
that the later models have the counter rotating props -- although i
don't know too much about what this means, other than its "better".

We fly a mooney now and thus I don't worry about the prop -- as long as
it keeps spinning.

Is there a web site that gives a good explanation as to why I want CR
props. There are hundreds of the earlier model Twin Comanches flying
without the CR props --- so what does someone with 300 hours single
engine time need to worry about? What actually goes wrong? And when
it does, what happens? I hear "critical engine" but it means very
little to me.

I like to fly and try to be very careful when I do fly... but I don't
follow too much aviation stuff other than how it affects me -- so I'm
not exactly a "buff", hence the above questions which may seem obvious
to many.

Why are we looking at a Twin Comanche? Because its a twin, safer for
IFR flight (perhaps this is only preceived), plus we live on the east
coast on an island so we're flying over water quite a bit. Also this
plane has decent speed and is an "economical" twin. We rarely fly with
4 people, so we don't need any more seats than 4.

Any help or links to help would be appreciated.

Thanks,

Dico